WO2000062286A1 - Multilayer optical disk, and method and device for recording optical information thereon - Google Patents

Multilayer optical disk, and method and device for recording optical information thereon Download PDF

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Publication number
WO2000062286A1
WO2000062286A1 PCT/JP2000/002159 JP0002159W WO0062286A1 WO 2000062286 A1 WO2000062286 A1 WO 2000062286A1 JP 0002159 W JP0002159 W JP 0002159W WO 0062286 A1 WO0062286 A1 WO 0062286A1
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WO
WIPO (PCT)
Prior art keywords
recording
surface
area
sector
data
Prior art date
Application number
PCT/JP2000/002159
Other languages
French (fr)
Japanese (ja)
Inventor
Ryutaro Futakuchi
Shunji Ohara
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP11/99664 priority Critical
Priority to JP9966499 priority
Priority to JP11/151078 priority
Priority to JP15107899 priority
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2000062286A1 publication Critical patent/WO2000062286A1/en

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Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00745Sectoring or header formats within a track
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/24Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403Layers; Shape, structure or physical properties thereof
    • G11B7/24035Recording layers
    • G11B7/24038Multiple laminated recording layers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/21Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215Recordable discs
    • G11B2220/216Rewritable discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/23Disc-shaped record carriers characterised in that the disc has a specific layer structure
    • G11B2220/235Multilayer discs, i.e. multiple recording layers accessed from the same side
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded

Abstract

An address signal and a data signal are correctly reproduced even if a multilayer optical disk is used which is produced by joining recording/reproducing faces in such a way that the first position of a sector on one recording/reproducing face does not completely agree with that on the other. In a working example, the relationship between the joining accuracy L and the length G of the gap area is given by L≤G. In another working example, information is recorded within a length range corresponding to the joining accuracy L in the gap area as well as in the data area, and thereby the first and last positions of each sector on one recording/reproducing face is made to agree with those on the other. In further another working example, guard areas are provided at the first and last portions of the data area.

Description

METHOD AND APPARATUS Technical Field records the bright fine manual multi-layer optical disc and an optical information thereto

The present invention is a multilayer optical disc having a plurality of recording reproduction surfaces, and to methods and apparatus for optically recording information on the multi-layer optical disc. BACKGROUND

Conventionally, as a recording reproducible multi-layer optical disc for a plurality of recording reproduction surfaces, for example, those described in Kohyo 1 0 5 0 5 1 8 8 No. are known.

Hereinafter, the structure of a conventional multilayered optical disc, to explain with reference to the drawings. Figure 7 shows a cross-sectional view of a cutaway of the conventional multilayered optical disc 1 0 in the direction of the track direction perpendicular. Incidentally, the case of two-layer structure for the sake of simplicity.

As shown in FIG. 7, the first side surface of the substrate 1, the guide groove 7 for tracking (recorded or advance Adore scan signal formed in a pit shape). Are formed, further the surface , said first reflecting portion of the light beam 8 have been narrowed down by the objective lens 9 which shines incident on the substrate 1, and the recording reproducing film for transmitting the part is deposited, the first recording reproduction surface 3 have been made form. Also, on the second surface of the substrate 2, the guide groove 6 for tracking (recorded or advance Adoresu signal formed in a pit shape) is formed, the light beam having passed through the first recording reproduction surface 3 8 is deposited recording reproduction film for reflecting the second recording reproduction surface 4 is formed. Further, the separation layer 5 for adjusting tension to separate the first recording reproduction surface 3 and the second recording reproduction surface 4 is interposed.

However, in the multilayer structure as described above (two-layer structure in the conventional example) is perpendicular to the above cross-section, that is, the cross-sectional view taken along the track direction are bonded together as shown in Figure 8, the following problem arises.

8 shows, for convenience of explanation, (shown in FIG. 9 (b)) actual sector one structure in a multilayer optical disc shown in plan view in FIG. 9 (a) for each of the recording playback surface schematic of sector is a representation as one structure.

FIG. 9 (b), as shown in FIG. 9 (a), an enlarged address area near 9 2 definitive to track certain of the multilayer same Kokoroen or helically formed track group in optical disc 9 1 Figure , and the first (n-1) and the part 9 3 of the groove sectors and foremost, an address pit portion 9 4 1 equivalent to Adoresu region to be described later of the n sectors one 9 4, the n sector one 9 followed by 4 shows a part 9 4 2 of the groove. When the groove portion is representable as a schematic sector one structure is divided into a gap area and a data area to be described later.

Further, in FIG. 8, first substrate 1 which is a component shown in FIG. 7, the second substrate 2, the separation layer 5 is omitted for convenience of explanation.

8, 3 1 the first recording reproduction surface, 4 1 is the second recording reproduction surface, 3 1 1, 3 1 2, and 3 1 3, respectively, Keru Contact to the first recording reproduction surface 3 1 Adoresu region, a Giyappu area for de Isseki region, and Adoresu regions 3 1 1 and de one data area 3 1 2 divides. Also, 4 1 1 4 1 2, and 4 1 3, respectively, Giyappu for dividing Adoresu region in the second recording reproduction surface 4 1, data area, and a Adoresu region 4 1 1 and the data area 4 1 2 it is a region.

Gap region 3 1 3, 4 1 3, when recording reproduction on a multilayer optical Dace click by a drive device, the signal clearly separate the data signal reproduced from the reproduced address signal and a data region also than the for the processing, the recording operation is performed respectively for the first Symbol recording reproduction surface 3 1 or the second recording reproduction surface 4 1 while avoiding the gap region 3 1 3, 4 1 3.

However, as shown in FIG. 8, the head of Adoresu regions 3 1 1 and 4 1 1, i.e., the head position of the sector one is glued shifted by L 1, and the recording and reproducing surface amount L 1 is two Re not a Part It is larger than the length G 1 of the gap region 3 1 3 and 4 1 3 in a region △ 1 of the rear end portion of the Adoresu area 3 1 1 of the first recording reproduction surface 3 1 second recording reproduction surface 4 a region △ 2 of the front end portion of the data area 4 1 2 in 1, light beam 8 1 irradiation direction, that is, overlaps as viewed from the paper surface top. The length of the region △ 1 and △ 2 is equal to L 1-G 1.

Further, the light beam 81 is transmitted through the region △ 1 in the first recording reproduction surface 3 1, information is irradiated to the region delta 2 in the second recording reproduction surface 4 1 is Rukoto recorded.

Here, when the two recording reproduction surfaces of the multilayer optical disc is supposed to be composed in the recording playback film of the phase change type, the principle of recording on the phase change type recording film, by irradiation of a high power light beam I met this to change its crystal structure, therefore, the region delta 2 in the second recording reproduction surface 4 1, i.e. during the recording in the area of ​​the front end portion of the data area 4 1 2 in the second recording reproduction surface 4 1 is employed, light beams 8 1 of power higher in the region △ 1 of the rear end portion of the address area 3 1 1 of the first recording reproduction surface 3 1 is irradiated. Therefore, it becomes possible to affect the crystal structure of the recording and reproducing films deposition on a part of Adoresu regions 3 1 1 of the first recording reproduction surface 3 1, as a result, the recording of the second to the recording surface 4 1 after operation ends, and you'll play in the address area 3 1 1 first recording reproduction surface 3 1, its SZN of the reproduced signal is deteriorated, the recognition of § address information is a problem that is not performed correctly. In the example shown in FIG. 8, with the first beginning position location of the recording and reproducing surface 3 1 of the sector one is shifted to the right side of the paper with respect to the second recording reproduction surface 4 1, the first recording reproduction surface 3 It has been described a case where first and second recording reproduction surface 4 1 is glued. Similarly, you can have when Nitsu head position of the first recording reproduction surface 3 1 of the sector one is bonded together so as to shift to the left side of the paper with respect to the second recording reproduction surface 4 1, the first recording reproduction surface 3 when the recording operation for one, will affect the second recording reproduction surface 4 1 of the address area 4 1 1, SZN of the reproduction signal from the address area 4 1 1 is deteriorated, the recognition of the address information is a problem that properly conducted will not.

Further, the number of recording surfaces as a conventional example has described the case of 2, in the case where the number is three or more recording reproduction surfaces also recording operation to an arbitrary recording reproduction surface, Adoresu in other recording reproduction surfaces Ri Do in influencing region, a problem occurs in that the recognition of the address information is not performed properly.

Further, when the pre-data to both the data area of ​​the recording reproduction surface in is recorded, when the recording operation of either the one of the recording reproduction surfaces, for the data area of ​​the other recording reproduction surface also results in each data area becomes heavy region (shown in FIG. 8 △ 3) at a high power light beam is irradiated, the occurrence of errors caused by deterioration of the S / N of the reproduced signal. In general, since the data is added error correction code, by the work, the degradation of SZN regenerated but the content of the data is somewhat restored reproduction signal in Les this de Isseki regions is complete, It will be described in more detail below.

Figure 1 0, like FIG. 8 is a diagram expressing a schematic sector one structure the actual sector structure of a conventional multilayer optical disc for recording and reproducing surface of each. Incidentally, in FIG. 1 0, the same elements as in FIG. 8 will be omitted are indicated by the same reference numerals. First, it will be described FIG. 1 0 (a). Figure 1 0 (a) shows a state in which the first recording playback surface 3 1 is bonded shifted to the second recording reproduction surface 4 1 with respect to the light beam 81 in the scanning direction (right side) . In Fig 1 0 (a), the section Z 1 or interval Z 3 are first de-recording reproduction surface 3 1 Isseki region 3 1 2 and the second recording reproduction surface 4 1 of the data area 4 1 2 a non-overlapping area, which corresponds to a predetermined accuracy at the time of bonding of the two recording reproduction surfaces. Further, the section Z 2 is that illustrates the first recording reproduction surface 3 1 of the data area 3 1 2 and the second recording reproduction surface 4 1 of the data area 4 1 2 and overlap region.

Since the first recording reproduction surface 3 1 of the data area 3 1 2 already optical information (data) when being recorded, different optical state of the recording and reproducing surface, light beams 8 1 of transmittance different, in the section Z 1 and the section Z 2 of the second recording reproduction surface 4 1 of the data area 4 1 2, so that the light beam 81 of the recording path Wa one used for irradiation is different.

Will now be described FIG. 1 0 (b). Figure 1 0 (b) shows a state in which the first recording playback surface 3 1 the light beam 81 in the scan direction with respect to the second recording reproduction surface 4 1 is bonded shifted in the opposite direction (left side) the shows. 1 0 (b) to show the section Z 1 or interval Z 3 is 1 0 Similarly to (a), the first recording reproduction surface 3 1 of de Isseki region 3 1 2 and the second recording reproduction surface 4 1 a region where the data area 4 1 2 do not overlap, which corresponds to a predetermined accuracy at the time of bonding of the two recording reproduction surfaces. Further, the section Z 2 is similarly overlaps with the first recording reproduction surface 3 1 of the data area 3 1 2 and the second recording Playback surface 4 1 of de Isseki region 4 1 2 and FIG. 1 0 (a) It shows the area.

Here, since the data already in the data area 3 1 2 of the first recording reproduction surface 3 1 when being recorded, different optical state of the recording and reproducing surface, light beams 8 1 transparently rate is different and the second recording reproduction surface 4 1 of the data area 4 1 Contact Keru section Z 2 2 and the section Z 3, so that the light beam 81 of the recording power is irradiated is different.

If, if the transmittance before recording is smaller than the transmittance after recording, in its permeability in consideration of the over-rate when the second recording records the reproduction surface 4 1, the optimum recording power in the section Z 2 de even be recorded Isseki, portions corresponding to the interval Z 1 (the case of FIG. 1 0 (a)) or the section Z 3 (the case of FIG. 1 0 (b)), irradiation recording light excessive power It is is will be. On the other hand, if the transmittance before recording is larger than the transmittance after recording, when recording on the second recording reproduction surface 4 1 in consideration of the transmittance data SL at the optimum recording power in the section Z 2 even can record, portions corresponding to the interval Z 1 (the case of FIG. 1 0 (a)) or the section Z 3 (the case of FIG. 1 0 (b)), the recording light of under-power is radiated It will be.

As a result, in order to obtain a reproduction signal from the second recording reproduction surface 4 1 (in the case of FIG. 1 0 (a)) interval of the reproduced signal Z 1 and Z 2 or zone Z 2 and Z 3 (FIG. 1 0 ( difference in signal amplitude at a portion corresponding to the case) of b) occurs, whereby by SZN difference in the data area occurs, even with error correction code that will be added to the data, the second recording reproduction surface 4 part of the data that has been recorded in one may not be read correctly.

In particular, when a phase-change material in the recording film constituting the recording surface, to the phase state (crystalline state and amorphous state) changes the recording Isseki de transmittance before and after recording big difference is, the problem will be noticeable. Disclosure of the Invention

Accordingly, an object of the present invention, in a state where the head position of the sector one in each recording reproduction surface does not completely match, even with the use of multi-layer optical disk which is constructed by laminating a plurality of recording reproduction surfaces, precise Adoresu signals and data to provide evening capable multilayer optical disk to reproduce the signals, and a method and apparatus for optically recording information on such a multilayer optical de Isku. To achieve the object, the first multi-layer optical disc according to the present invention, pre-recorded address area and de Isseki region, sector one divided by the gap region having a pre length defined area a plurality of recording reproduction surfaces that have a structure, as the head position of the sector one of the plurality of recording reproduction surfaces is less than the length of the precision with the said Giyappu region, the previous SL plurality of recording reproduction surfaces wherein the veneered.

In order to achieve the above object, the second multilayer optical Dace click according to the present invention, a plurality of recording reproduction surfaces prerecorded Adoresu area and the data area are has a sector one structure which is divided by Giyappu region the has been laminated in sectors one head position predetermined accuracy relative to the, characterized in that said gear Tsu length with the flop region is predetermined accuracy or higher relative to the head position of the sector one to.

In order to achieve the above object, the third multilayer optical Dace click according to the present invention, disposed between the address area, and a data area for recording information, and the address area and the data area and predetermined first and multilayer optical disc der connexion with the second recording surface having a length of a Giyappu area respectively, the beam irradiated to the recording / reproducing of information with respect to the recording surface when viewed from the direction, characterized in that the amount of deviation between the head position of said second recording surface of Adoresu region of Adoresu region of said first recording surface is smaller than the length of the Giya' flop region to.

In order to achieve the above object, a fourth multilayer optical Dace click according to the present invention, between the address area, and de Isseki area for recording information, and the address area and the data area irradiated arranged a predetermined length of the gap area first and multilayer optical disc der connexion with the second recording surface, each having, for recording Z reproducing information for the recording surface when viewed from the direction of the beam, the deviation amount between the rear end position of Adoresu region of the rear end position and the second recording surface of Adoresu area of ​​the first recording surface, than the length of the Giya' flop region and wherein the small.

In order to achieve the above object, an optical information recording method according to the present invention, the layer each have a sector one structure in which a Giyappu region between the Adoresu area and a data area in the scanning direction of the light beam Keru All the plurality of recording reproduction surfaces formed, and accuracy L was Hariawa relative to the head position of the sector one is recording surface, a length G in the scanning direction of the gap region, the whole hand a method for optically recording information on the configuration multilayer optical disk to have a recording surface L≤G the relationship for, for the head position of the sector one of definitive to the certain recording reproduction surface, in other recording reproduction surfaces detecting the amount of deviation of the head position of the sector one, on the basis of the displacement amount detected, recording reproducing surface data recording start position and the data recording end position of the previous SL plurality of each of the sector one To match at, and sets the previous SL data recording start position and the data recording ending position for each recording reproduction surface.

In the above optical information recording method according to the present invention, the data area of ​​the recording reproduction surface where the head position of the sector one is most displaced in the direction opposite to the scanning direction among the plurality of record reproduction surface it is preferable to set the start position and end position as the data recording start position and the data recording end position, respectively.

In order to achieve the above object, an optical information recording apparatus according to the present invention, a sector one structure in which a Giyappu region between the Adoresu region and de Isseki area scanning direction of the light beam layer Contact Keru a plurality of recording reproduction surfaces formed on each, and accuracy L was Hariawa relative to the head position of the sector one is recording surface, a length G in the scanning direction of the gap region, the entire a method for optically recording information on the configuration multilayer optical disc so as to have a L≤G the relationship for reproducing surface of Te, for the head position of the sector one of definitive to the certain recording reproduction surface, the other recording reproduction a detector for detecting a deviation amount of the head position of the sector one in the plane, on the basis of the shift amount it detects by the detection unit, the data recording start position of each of the sectors first and a data recording end The completion position to match the plurality of recording reproduction surfaces, that example Bei a gate one preparative signal generator for generating a gate signal for instructing said data recording end position from the data recording start position in each recording reproduction surface the features.

Incidentally, in the optical information recording apparatus according to the present invention, the gate signal is recording the head position of the sector one of the plurality of recording reproduction surfaces is most displaced in the opposite direction to the run 査 direction it is preferable to indicate the start and end positions of the data area in the surface as the data recording start position and the data recording end position, respectively.

Furthermore, in order to achieve the above object, a fifth multilayer optical disc of the present invention has a sector one structure in which a gear-up area between the Adoresu area and a data area in the scanning direction of the light beam a plurality of recording reproduction surfaces is formed layers, a multilayer optical disc head position of the sectors one at each recording reproduction surfaces formed by laminated so as to be close in Oite predetermined accuracy to the scanning direction, the scanning direction wherein the data tip portion of the region and the rear end portion minutes, and Toku徵 that Gadode Isseki recording area having a length of more than the predetermined accuracy is assigned at.

According to the above arrangement, the following length of the predefined gap region the accuracy of bonding of a plurality of recording reproduction surface in a multilayer optical disc, Moshiku the above accuracy of bonding the length of Giyappu regions of the plurality of recording reproduction surfaces by Rukoto to the recording operation of the arbitrary recording reproduction surface, without affecting the definitive address space for other recording reproduction surfaces, Oite during reproduction after recording was completed, the recognition of the Adoresu information correctly It can be carried out.

Further, also be bonded in a state where a plurality of recording reproduction surface is shifted in the not coincide with each other, have a L≤G the relationship to the length G of the predetermined accuracy L and Giyappu region corresponding to the deviation amount so, there is a recording range of the recording surface to match the data area, as an area including the Giyappu region of part of the recording range in the majority of the data area to another recording surface, data in a plurality of recording reproduction surfaces Ri by to record evening to match the recording start position and the data recording end position, also recording reproduction surface where there is a previously recorded, at the time of the record to other recording reproduction surfaces, a uniform recording it can be recorded in power. Thus is prevented non-uniform recording power, amplitude difference in the data of the reproduced signal, than is ie SZN difference suppression, it is possible to accurately reproduce the recorded de Isseki information.

Furthermore, even if the there has been a partial overlap in the scanning direction to each de Isseki regions in the plurality of recording reproduction surfaces, by providing the guard data recording area for data protection in the tip portion and rear portion of the data area, the guard differences there addressed amplitude due to differences in the effective power of the recording light to the reproduction signal of the data recording region, reproduction de Isseki no effect at all on the information, it is possible to obtain accurate reproduced data information. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a diagram showing a schematic sector one structure in each recording reproduction surface in a multilayer optical disc according to the first embodiment of the present invention.

Figure 2 is a diagram showing a schematic sector one structure in each recording reproduction surface in a multilayer optical disc according to a second embodiment of the present invention.

FIGS. 3 (a) and 3 (b), respectively, for explaining an example of a multilayer optical disk recording method according to the third embodiment of the present invention, the first recording reproduction surface with respect to the second recording reproduction surface when shifted in the scanning direction, and the scanning direction in the case where displacement in the opposite direction, is a diagram showing a schematic sector one structure in each recording reproduction surface in a multilayer optical disc.

Figure 4 is a block diagram illustrating one configuration of a multilayer optical disk recording apparatus according to a fourth embodiment of the present invention.

FIGS. 5 (a) and 5 (b), respectively, corresponding to the deviation of each recording reproduction surface shown in FIG. 3 (a) and 3 (b), the major signals in the multilayer optical disk recording apparatus shown in FIG. 4 it is a timing diagram.

FIGS. 6 (a) and 6 (b), respectively, when the first recording reproduction surface is shifted in the scanning direction with respect to the second Symbol recording reproduction surface, and the scanning direction in the case where displacement in the opposite direction is a diagram showing a schematic sector one structure in each recording reproduction surface in a multilayer optical disc according to a fifth embodiment of the present invention.

Figure 7 is a sectional view taken along a conventional multilayer optical disc in the track direction perpendicular.

Figure 8 is a diagram showing a schematic sector structure of each recording reproduction surface in a conventional multilayer optical disc.

Figure 9 (a) and FIG. 9 (b), respectively, a plan view of a multi-layer optical disc, and an enlarged view of a Adoresu area near the track.

Figure 1 0 (a) and FIG. 1 0 (b), respectively, when the first recording reproduction surface when displaced in the scanning direction with respect to the second recording reproduction surface, and that the scanning direction is shifted in Gyakukata direction in a diagram showing a schematic sector one structure in each recording reproduction surface in a conventional multilayer optical disc. BEST MODE FOR CARRYING OUT THE INVENTION

It will be described below with reference to the accompanying drawings preferred embodiments of the present invention. Here, for simplicity, the case intended for the multilayer optical disc having a two-layer structure.

(First Embodiment)

Figure 1 is intended according to the first embodiment of the present invention showing the sector one structure of each recording reproduction surface in a multilayer optical disc, in order to clarify the features of the present invention, similar to FIG. 8 showing a conventional example It is expressed by the schematic sector one structure.

1, 3 2 and 4 2, respectively, also of the is shown the first recording reproduction surface and the second recording reproduction surface in the present embodiment as sector one Fomatsuto. Further, 3 2 1 and 4 2 1 are each a Adoresu area of ​​the first recording reproduction surface 3 2 and the second recording reproduction surface 4 2, 3 2 2 and 4 2 2, respectively, the first recording reproduction surface 3 is 2 and the second recording reproduction surface 4 2 of the data area, 3 2 3, and 4 2 3, advance its length is defined, first Symbol recording reproduction surface 3 2 and the second recording reproduction surface 4 2 of a respective Giyappu region, its length is both G 2.

Further, L 2 is when the first recording reproduction surface 3 2 and the second recording reproduction surface 4 2 is I tension if shows a deviation amount of the head position of the sector one in each recording surface of the. The shift amount L 2, since in comparison to L 2≤G 2 the relationship between the length G 2 of the gap region 3 2 3 and 3 2 4, the first recording reproduction surface 3 2, as shown in FIG. 8 and the rear end of the address area 3 2 1, the second front end of the recording surface 4 2 of the de Isseki region 4 2 2, direction in which the light beam 82 is irradiated, i.e., when viewed from the plane top, overlaps in region is not present, the allowable value of the shift amount L 2 in which the overlap region no longer exists, corresponds to the length G 2 having the gap region 3 2 3 and 4 2 3. In other words, regions overlapping if by the precision L 2 of the lamination at the head position of the sector foremost length G 2 hereinafter gap region is not present.

Therefore, according to FIG. 1, when recording on the second recording reproduction surface 4 2, the light beam 82 of high power is irradiated from the second head of the recording surface 4 2 of the data area 4 2 2, the when the first recording reproduction surface 3 second region where the light beam 82 of high power is irradiated becomes the gap region 3 2 3. Therefore, it is possible to avoid the irradiation of the first recording reproduction surface 3 2 of higher power to address area 3 2 1 affects for the crystal structure of the recording and reproducing film formed on Adoresu region 3 2 1 it is no, as a result, after the record operation is completed for the second recording reproduction surface 4 2, even when reproducing the address area 3 2 1 first recording reproduction surface 3 2, the SZN of the reproduction signal deteriorates rather, the recognition of address information is done correctly.

Further, in the present embodiment, as shown in FIG. 1, in the state the head position of the first recording reproduction surface 3 2 sectors one is shifted to the right side of the paper with respect to the second recording reproduction surface 4 2, first recording has been described a case where reproducing surface 3 2 and the second recording reproduction surface 4 2 is attached to each other. However, as also when the head position of the first recording reproduction surface 3 2 of sector are bonded together so as to shift to the left side of the paper with respect to the second recording reproduction surface 4 2, the first recording reproduction surface 3 2 pair during the recording operation, the high light beam 82 of the power is radiated from the first head of the recording and reproducing surface 3 2 de Isseki region 3 2 2, in this case, the higher power Hikaribi over Program 8 second recording reproduction surface 4 2 of the region 2 is irradiated becomes the gap region 4 2 3.

Therefore, it is possible to avoid the irradiation of the second recording reproduction surface 4 2 of the high power to the address area 4 2 1, influence on the crystal structure of the recording and reproducing film formed on Adoresu region 4 2 1 it is no, as a result, after the completion of the recording operation of the first recording playback surface 3 2, also play the Adoresu region 4 2 1 of the second recording reproduction surface 4 2, the SZN of the reproduction signal deteriorates rather, the recognition of address information is performed correctly.

Further, in the present embodiment, for although describes the case of the number of recording reproduction surfaces 2, when the number is three or more recording reproduction surfaces also recording operation to an arbitrary recording reproduction surface, the other recording reproduction there is no Succoth affect the address area on the surface, it is not even or say that the recognition of the address information is carried out correctly.

Thus, the amount of deviation of the head position of the sector one of the plurality of recording reproduction surfaces, that is, as a plurality of recording reproduction surfaces of the lamination precision becomes less than the length of the predefined formic Yap region, a plurality of recording by the Hariawasuko playing surface, so that the recognition of the address information is correctly during reproduction after recording.

(Second Embodiment)

Figure 2 is shows the sector one structure of each recording reproduction surface in a multilayer optical disc according to a second embodiment of the present invention, in order to clarify the features of the present invention, like the first embodiment, schematically It is expressed in a specific sector one structure. 2, 3 3 and 4 3, in which the first recording reproduction surface and the second recording reproduction surface in the present embodiment is shown as a sector one Fomatsuto. Also, 3 3 1 and 4 3 1 are each a Adoresu area of ​​the first recording reproduction surface 3 3 and the second recording reproduction surface 4 3, 3 3 2 and 4 3 2, respectively, the first recording reproduction surface 3 is 3 and the data area of ​​the second recording reproduction surface 4 3, 3 3 3 and 4 3 3, respectively, are Giyappu area of ​​the first recording reproduction surface 3 3 and the second recording reproduction surface 4 3.

Further, L 3 is when the first recording reproduction surface 3 3 and the second recording reproduction surface 4 3 is I tension if shows a deviation amount of the head position of the sector one in each recording surface of the. The shift amount L 3 is, when the bonding of the first recording reproduction surface 3 3 and the second recording Playback surface 4 3, relative to the beginning of each sector of all, the precision limits of the lamination, i.e., It indicates the maximum value of the deviation amount. Accordingly, when compared with Giyappu region 3 3 3 and 4 3 3 length G 3, L for 3≤G is 3, the address area 3 that put the first recording reproduction surface 3 3 as illustrated in FIG. 8 3 1 and the rear end, in the second recording reproduction surface 4 3 of the data area 4 3 2 at the front end, the direction in which the light beam is irradiated, i.e., when viewed from the plane top, no longer exists overlap region, the overlap to eliminate areas would the length G 3 of the gap region is set to each recording surface of the bonding limit value L 3 or more lengths of accuracy.

Therefore, according to FIG. 2, when the recording on the second recording reproduction surface 4 3, the light beam 8 3 high power is emitted from the second head of the recording surface 4 3 of the data area 4 3 2, this when, the area of ​​the first recording reproduction surface 3 3 where the light beam 8 3 high power is irradiated becomes the gap region 3 3 3. Therefore, it is possible to avoid the irradiation of the high power to Adoresu region 3 3 1 of the first recording reproduction surface 3 3 affect for the crystal structure of the recording and reproducing film formed in the address area 3 3 1 it is no, as a result, after the record operation is completed for the second recording reproduction surface 4 3, even when reproducing the address area 3 3 1 of the first recording reproduction surface 3 3, the SZN of the reproduction signal deteriorates rather, the recognition of address information is done correctly.

Further, in the present embodiment, as shown in FIG. 2, in the state the head position of the first recording reproduction surface 3 3 sectors one is shifted to the right side of the paper with respect to the second recording reproduction surface 4 3, the first recording It has been described a case where reproduction surface 3 3 and the second recording reproduction surface 4 3 are glued together. However, as also when section evening one head position of the first recording reproduction surface 3 3 are bonded together so as to shift to the left side of the paper with respect to the second recording reproduction surface 4 3, the first recording reproduction surface 3 during recording operation against the 3 has a high power of the light beam 8 3 is irradiated from the first head of the recording and reproducing surface 3 3 of the data area 3 3 2, in this case, the higher power Hikaribi over Program 8 3 There area of ​​the second recording reproduction surface 4 3 to be irradiated becomes the gap region 4 3 3.

Therefore, to effect on the crystal structure of the second can avoid irradiation of high power to the recording and reproducing surface 4 3 the address area 4 3 1, recording and reproduction film formed in the address area 4 3 1 no, as a result, after the completion of the recording operation of the first recording reproduction surface 3 3, even when reproducing the address area 4 3 1 of the second recording reproduction surface 4 3 without SZN of the reproduction signal is degraded, recognition of address information is performed correctly.

Further, in the present embodiment, for although describes the case of the number of recording reproduction surfaces 2, features of the present invention is applied available-even if the number is three or more recording reproduction surfaces, according to the present invention in the recording operation to the arbitrary recording reproduction surface, without affecting the Adoresu regions in other record reproducing surface, the recognition of its Adore scan information correctly.

Thus, the length of the gap region, by securing the above limit value of the plurality of recording reproduction surfaces of the bonding precision, will be recognized in § address information at the time of reproduction after recording is performed correctly, first same effect as shown in the embodiment can be obtained.

The first and second embodiments, although the amount of deviation of the sector one head position is equal to or less than the length of the gear-up area, the deviation amount of the rear end of the address region is Giyappu region length it is also characterized or less.

(Third Embodiment)

FIGS. 3 (a) and 3 (b) is a diagram expressing the actual sector one structure in each recording reproduction surface in a multilayer optical disk as schematic sector one structure according to a third embodiment of the present invention. 3 (a) is the first recording reproduction surface 3 4 shows the bonded state in a state of FIG light beam 8 4 in the scanning direction (right side in the figure) with respect to the second recording reproduction surface 4 4 . Further, FIG. 3 (b) shows a state in which the first recording reproduction surface 34 which is bonded with a shift in the scanning Direction opposite direction of the light beam 84 (shown left) with respect to the second recording reproduction surface 44 ing.

In FIGS. 3 (a) and 3 (b), 34 1, 34 3, 34 2 address regions of the first recording reproduction surface 34, respectively it, the gap region, shows a data area, 44 1, 44 3, 44 2 Adore source region of the second recording reproduction surface 44, respectively, the gap region, indicating the data area. Incidentally, 34 1 and 44 1, 3 4 3 44 3 3 4 2 44 2 A, the scanning direction of Hikaribiichimu 84 have respective equal length. Further, the section Z 1 is, in FIG. 3 (a), shows a section head portion of the data area 442 of the second recording reproduction surface 44 overlaps with the gap region 34 3 of the first recording reproduction surface 34, FIG. 3 (b in), indicating a section head portion of the data area 3 42 of the first recording reproduction surface 34 overlaps with the gap region 44 3 of the second recording reproduction surface 44. Therefore, the section Z 2 represents a section with de Isseki region 34 2 of the first recording reproduction surface 34 and the data area 442 of the second recording reproduction surface 44 overlaps, the section Z 1 is a first recording reproduction surface 34 corresponding to the bonding accuracy of the second recording reproduction surface 44. Further, the section Z 1 is configured to be equal to or less than the length of the gap area 44 3 of the first recording reproduction surface 34 of the gap region 3 4 3, and the second recording reproduction surface 44.

Further, in FIG. 3 (a), a region X 1 shown by hatching in the first recording reproduction surface 34, that indicates the recording range for recording information on the first recording reproduction surface 34. That is, the recording range X 1 for recording information on the first recording reproduction surface 3 4 is in the range of the sum of the section Z 1 and the section Z 2 of the rear end portion of the gap region 34 3 of the first recording reproduction surface 34 It corresponds to.

In this manner, the recording range for recording information on the first recording reproduction surface 34 and set to the same as the data area 442 of the recording range for recording information on the second recording reproduction surface 44, the first recording range definitive on recording surface 34 and the second recording reproduction surface 44 is coincident. In other words, the data recording starting position and the data recording end position and coincide with the two recording reproduction surfaces.

Amount of information to be recorded are the same in the two recording reproduction surfaces. The amount of information, ing equal to the amount of information predetermined by the data areas 342 and 442.

On the other hand, in FIG. 3 (b), the region X 2 shown by hatching in the second recording reproduction surface 44, that indicates the recording range for recording information on the second recording reproduction surface 44. That is, the recording range X 2 for recording information on the second recording reproduction surface 44, corresponding to the area of ​​the sum of the section Z 1 and the section Z 2 of the rear end portion of the gap region 443 of the second recording reproduction surface 44 to.

In this manner, the recording range for recording information on the second recording reproduction surface 44 and set to the same as the data area 342 of the recording range for recording information on the first recording reproduction surface 34, the first recording range definitive on recording surface 34 and the second recording reproduction surface 44 is coincident. In other words, the data recording starting position and the data recording end position and coincide with the two recording reproduction surfaces. Again, the amount of information to be recorded is the same in the two recording reproduction surfaces, the amount of information, ing equal to the amount of information predetermined by the data areas 342 and 442.

Thus, also be bonded in a state where two recording reproduction surface is shifted in the not coincide with each other, predetermined accuracy L (FIG. 3 corresponding to the amount of deviation (a) 及 beauty FIG 3 (b) in the interval the length of Z 1) and to have a L≤G the relationship to the length G of the gap region 343 and 4 43, when the recording range de Isseki region to one of the recording reproduction surface (FIGS. 3 (a) 442, to match the 3 42) in the case of FIG. 3 (b), when the area including a part of the gap region (FIGS. 3 (a) the recording range to the other recording reproduction surface in the majority of the data area as X 2) is the case of X 1, FIG. 3 (b), the recording range in the two recording reproduction surfaces, that is, more to record by matching the de Isseki recording start position and the data recording end position, the even first recording reproduction surface is already recorded, when recording on the second recording reproduction surface can be recorded at a uniform recording power. Thus is prevented non-uniform recording power as described in accordance come example, also suppressed the amplitude difference of the reproduced signal. Thus, information recorded is reproduced accurately.

Moreover, the amount of information to be recorded in the two recording reproduction surfaces is not reduced from the pre-defined amount in the data area of ​​each recording reproduction surface. Further, the bonding precision of the two recording reproduction surfaces, if less than the length of Giyappu region between the address area and the data area, be matched to the recording start position in the two recording reproduction surfaces, either one never recording start position in the recording reproduction surface interrupts the Adoresu area of ​​the recording surface. Therefore, also affect the reproduction signal Adoresu region beyond.

As described above, multilayer optical disk recording method according to the present embodiment, without affecting the reproduced signal of information amount Ya Adoresu area for recording, the recording surface of Te to base, the optical information with a uniform recording power it is intended to to be recorded as possible.

Incidentally, as described above, when the recording and reproducing surface is two, it is preferable to match the one of the recording surface of the data area range that records the data.

(Fourth Embodiment)

Fourth embodiment relates to an information recording and reproducing apparatus for recorded information to a multilayer optical disc described in the third embodiment.

Hereinafter, with reference to the accompanying drawings, a description will be given of the information recording and reproducing apparatus in the embodiment. Incidentally, the multilayer optical disc of interest because it was describes in the third embodiment, sequentially quoted while describing FIG. 3 (a) and FIG. 3 (b).

Figure 4 is a block diagram showing a configuration of an information recording reproducing apparatus according to a fourth embodiment of the present invention. 2, 1 0 1 reproduction light, 1 02 is a recording beam, the reproducing light 1 0 1 or recording light 1 0 2, at a rotation speed by through the objective lens 1 2 2 obtain a predetermined linear velocity against multi-layered optical disc 1 0 0 which is rotating (with a two-layer structure shown in FIG. 3 (a) and FIG. 3 (b)), the recording of the playback or information signals. Further, 1 50 Isseki motor for rotationally driving the multi-layer optical disc 1 0 0, 1 5 1 is mounted on motor Isseki mouth for outputting a single pulse 1 5 2 at a time rolling Isseki a re-encoder.

Furthermore, 1 04 is a photoelectric converter, is to obtain a reproduced signal 1 0 5 of the electrical signal from the reproducing light 1 0 1. Reproduced signal 1 0 5 is inputted to the address signal reproduction processing unit 1 06 (portion surrounded by a dotted line in FIG. 4), the envelope detection circuit 1 0 7 constituting the § address signal reproduction processing unit 1 06, the comparator 1 09 , and is processed by the edge detection circuit 1 1 0, from Adoresu signal reproducing processor 1 0 6, the reset signal 1 1 5 for counter evening 1 2 3 is output. On the other hand, the counter 1 2 3, clock 1 1 1 at its clock input terminal, are entered in the data input terminal set values ​​P and Q.

Figure 3 when (a) and the recording operation to the first recording reproduction surface 34 in FIG. 3 (b) is performed, set in the counter 1 2 3 via the set value P 1 and Q 1 is selected circuit 1 30 the set value P and Q are. On the other hand, when the recording operation is performed on the second recording playback surface 44, set values ​​P and Q setpoint P 2 and Q 2 is set to the counter 1 2 3 via the selected 択回 path 1 3 0 Doo ing. The selection circuit 1 3 0 is controlled by the state of the control command 1 3 1, the control command 1 3 1 state, or the recording operation to the first recording reproduction surface 34 is done, the second recording reproduction surface 4 recording operation is by connexion decision on whether made to the 4.

The counter 1 2 3 from Do ivy time to Akutibu by a reset signal 1 1 5, after the first where the constant time determined by the set value P and the clock 1 1 1 frequency, the set of flip-flops 1 2 4 and it outputs the input signal 1 1 9. Also, counter evening 1 2 3, from the time, after a second predetermined time which is determined by the set value Q and the clock 1 1 1 frequency, and outputs a reset input signal 1 2 0 of flip-flop 1 2 4. Accordingly, the first predetermined time and second predetermined time is a first recording reproduction surface 3 4 different time had us when recording to the second recording reproduction surface 4 4.

Further, by controlling the Suitsuchi 1 1 2 by the output signal 1 2 1 flip-flop 1 2 4, are controlled supply to the recording data 1 1 3 of the optical modulator 1 0 3, the recording signal 1 2 5 can get. Further, the irradiation from the recording signal 1 2 5, the recording light 1 0 2 obtained by the action of the optical modulator 1 0 3, the record light 1 0 2 in the multilayer optical disk 1 0 0 via the objective lens 1 2 2 It is, so that the desired data is recorded.

Thus, the counter 1 2 3 and value P, Q, flip-flop 1 2 4 constitutes a recording gate generation unit that generates a recording gate signal. Next, the operation of the information recording and reproducing apparatus according to the present embodiment configured as above, first described with reference to FIGS. 5 (a) showing the timing of its major signal.

5 (a) is the first recording reproduction surface 3 4 with respect to the second recording reproduction surface 4 4, the bonding accuracy is Z 1, and are bonded together with a shift to the right side, FIG. 3 illustrates the process of generating a timing to decide the recording operation of the multi-layer optical disc shown in (a) (Note that in FIG. 3 (a), as a recording light irradiated from the paper top light beam 8 4 becomes the reproduction light during reproduction).

In FIG. 5 (a), 1 0 5 a, 1 1 6 a, 1 1 7 a, 1 1 5 a is reproduced signal 1 0 5 (address region when each was regenerated a first recording reproduction surface 34 shows the Adoresu reproduced signal only from), the output signal 1 1 6 of the envelope detection circuit 1 07, the output signal 1 1 7 of comparator evening 1 0 9, the edge detecting circuit 1 1 0 of the output signal 1 1 5 (counter evening 1 corresponding to a reset signal) 23. Further, 1 1 9 a, 1 2 0 a, respectively, when the setting value P and Q to the selection circuit 1 30 to thus counter 1 2 3 was P 1, Q 1 ToNatsu respectively, i.e., first recording reproduction set signal 1 1 9 to the flip-flop 1 24 when an attempt is made to record with respect to the surface 34, and equivalent to the reset signal 1 2 0, 1 2 1 a is the output signal 1 2 1 flip-flop 1 24 It corresponds to (switch 1 1 2 of the control signal). Further, T 1 a is 1 1 5 a is a time to 1 1 9 a from the time when the Akuti blanking is Akutibu, corresponds to a first predetermined time on SL, T 2 a is 1 1 9 a is the 1 20 a from the time which becomes active a time until the active equivalent between when the second predetermined.

Further, T 2 a, the output signal 1 2 1 flip-flop 1 24 (control signal Suitsu Ji 1 1 2), i.e., equal to the time 1 2 1 a is active, therefore, 1 2 5 a the recording data 1 1 3 is a timing of a recording signal 1 2 5 which is Suitsuchi 1 1 2 Dege over preparative.

Further, 1 0 5 b, 1 1 6 b, 1 1 7 b, 1 1 5 b (shown only in address reproduction signal), respectively, the reproduced signal 1 0 5 when reproducing the second recording reproduction surface 44 , the output signal 1 1 6 of the envelope detection circuit 1 0 7, the output signal 1 1 7 of comparator evening 1 0 9, the output signal 1 1 5 of the edge detection circuit 1 1 0 (reset signal forces © down evening 1 2 3) It corresponds to. Further, 1 1 9 b, 1 20 b, respectively, when the setting value P 及 beauty Q to the counter 1 2 3 by the selection circuit 1 3 0 becomes P 2, Q 2 respectively, i.e., the second recording reproduction set signal 1 1 9 to the flip-flop 1 24 when an attempt is made to pair and recorded on the surface 44 corresponds to the reset signal 1 2 0, 1 2 1 b is the output signal 1 2 1 flip-flop 1 24 ( It corresponds to switch 1 1 2 of the control signal). Further, T ib is, 1 1 5 b 1 1 9 b from the time that is active is a time until the active, corresponds to the first predetermined time, T 2 b are, 1 1 9 b is is 1 20 b from time to become active a time until the active, corresponding to the second predetermined time.

Further, T 2 b, the output signal 1 2 1 flip-flop 1 24 (control signal Suitsu Ji 1 1 2), i.e., equal to the time 1 2 1 b is active, therefore, 1 2 5 b the recording de Isseki 1 1 3 is a timing of Suitsuchi 1 1 2 Dege Ichiboku been recorded signals 1 2 5.

Therefore, the T la and T la + T 2 a is determined respectively by the clock frequency of the set value P 1 and Q 1 and counter evening 1 2 3, and T 1 b and T 1 b + T 2 b is set value P 2 and Q 2 and counter evening would be determined respectively by the clock frequency of 1 23, T1s & and Ding 1 13, T la + T 2 a and T lb + T 2 b and each a different time.

Therefore, the first recording reproduction surface 34 of the multilayer optical disc 1 00 of interest and the second recording reproduction surface 44 are bonded as shown in FIG. 3 (a), rotating the multilayer optical disc 1 00 is at a predetermined linear velocity V Assuming that to be the time of recording on the first recording reproduction surface 34, the value of T 1 a (a 2 + G 2- Z 1) ZV (wherein, A2, G 2, respectively, Adore source region 34 1 of the length of the first recording reproduction surface 34, determines the set value P 1 to be equal to indicate the length of the gap region 343), the value of T 1 a + T 2 a (a 2 + G 2 + Z 2) ZV, determines a set value Q 1 to be equal to. Then, these values ​​so that the set value for the counter 1 2 3 determines the state of the control input 1 3 1 selection circuit 1 3 0.

On the other hand, when recording on the second recording reproduction surface 44, the value of T ib (A 3 + G 3) Bruno V (wherein, A3, G 3, respectively, the address of the second recording reproduction surface 44 region 44 1 of the length, to determine the set value P 2 in the equal Kunar so indicate) the length of the gap region 443, the value of T lb + T 2 b (a 3 + G 3 + Z 1 + Z 2) / V, i.e., (a 3 + G 3 + D 3) / V (where, D 3'm urchin set value equal to indicating the length) of the data area 442 of the second recording reproduction surface 44 to determine the Q 2. Then, as described above, these values ​​so that the set value for the counter evening 1 2 3 determines the state of the control input 1 3 1 selection circuit 1 30.

In this way, the time that the recording signal 1 2 5 a recording signal 1 2 5 b to the second Symbol recording reproduction surface 44 of the first recording reproduction surface 34 is in the Akutibu state, and T 2 a become the same timing both the T 2 b, and a data recording starting position and the data recording end position, so that the first recording reproduction surface 34 matches the second recording playback surface 44. That is, the recording range, the section XI becomes as shown in the first recording reproduction surface 34 FIG. 3 (a), thereby coinciding with a data area 442 in the second recording reproduction surface 44.

In other words, at the time of recording on the first recording reproduction surface 34, that advances the recording start position from the beginning of the data area 342 by the precision Z 1 of attachment of the two recording reproduction surfaces (ie, the scanning direction is opposite direction is displaced), the recording termination position data area 342 of the first recording reproduction surface 34 and the rear end region Z 2 to the data area 442 of the second recording reproduction surface 44 overlaps, the second recording reproduction surface 4 during recording to 4, by the data area 442 to a predetermined a record range, two recording reproduction surfaces at the data recording start position and the data recording end position and is over match, i.e., the recording range There ing to match. Next, the operation of the information recording and reproducing apparatus according to the present embodiment shown in FIG. 4 will be described with reference to FIG. 5 (b) showing the timing of its major signal.

FIG. 5 (b), the first recording reproduction surface 34 and the second recording reproduction surface 44, the bonding accuracy is Z 1, and were together stretched with a shift to the left side, FIG. 3 ( the timing to decide the recording operation of the multi-layer optical disc shown in b) is an illustration for the process of being created (Note, and FIG. 3 (b) in the light of the recording light irradiated from the paper top beam 84 is the reproduction light at the time of playback).

In FIG. 5 (b), 1 0 5 a, 1 1 6 a, 1 1 7 a, 1 1 5 a playback addresses from the reproduction signal 1 0 5 (address area when reproducing the first recording reproduction surface 34 signal only shows a), the output signal 1 1 6 of the envelope detection circuit 1 0 7, comparator output signal 1 1 7 evenings 1 0 9, the output signal 1 1 5 of edge detecting circuit 1 1 0 (counter 1 2 3 It corresponds to a reset signal). Also, 1 1 9 a, 1 20 a, respectively, when the setting value P and Q to counter evening 1 2 3 by the selection circuit 1 30 becomes P 1, Q 1, respectively, i.e., first recording reproduction set signal 1 1 9 to the flip-flop 1 24 when an attempt is made to record with respect to the plane 34 corresponds to the reset signal 1 20, 1 2 1 a, the output signal of the flip-flop 1 24 1 2 1 (switch equivalent to 1 1 2 of the control signal). Further, T la is, 1 1 5 a is 1 1 9 a a time when the active is a time until the active, corresponds to the first predetermined time, T 2 a is, 1 1 9 a there a time until the 1 20 a from the time when the active becomes Akutibu, it corresponds to the second predetermined time.

Further, T 2 a, the output signal 1 2 1 flip-flop 1 24 (control signal Suitsu Ji 1 1 2), i.e., equal to the time 1 2 1 a is active, therefore, 1 2 5 a the recording data 1 1 3 is a timing of a recording signal 1 2 5 which is Suitsuchi 1 1 2 Dege over preparative.

Further, 1 0 5 b, 1 1 6 b, 1 1 7 b, 1 1 5 b (shown only in address reproduction signal), respectively, the reproduced signal 1 0 5 when reproducing the second recording reproduction surface 44 , corresponding to the output signal 1 1 6 of the envelope detection circuit 1 0 7, the output signal 1 1 7 of comparator evening 1 0 9, the output signal 1 1 5 of the edge detection circuit 1 1 0 (reset signal forces Unta 1 2 3) to. Further, 1 1 9 b, 1 20 b, respectively, when the setting value P 及 beauty Q to the counter 1 2 3 by the selection circuit 1 3 0 becomes P 2, Q 2 respectively, i.e., the second recording reproduction set signal 1 1 9 to the flip-flop 1 24 when an attempt is made to pair and recorded on the surface 44 corresponds to the reset signal 1 20, 1 2 1 b, the output signal 1 2 1 flip-flop 1 24 ( It corresponds to switch 1 1 2 of the control signal). Also, T 1 b is a time to 1 1 5 b is 1 1 9 b from the time when the active is Akute Eve, corresponds to the first predetermined time, T 2 b is 1 1 9 b is 1 20 b from the time that is activated by a time until the active, corresponding to the second predetermined time.

Further, T 2 b, the output signal 1 2 1 flip-flop 1 24 (control signal Suitsu Ji 1 1 2), i.e., equal to the time 1 2 1 b is in the Akutibu, therefore, 1 2 5 b the recording de Isseki 1 1 3 is a timing of the switch 1 1 2 Dege Ichiboku been recorded signals 1 2 5.

Therefore, the T 1 a and T 1 a + T 2 a is determined respectively by the clock frequency of the set value P 1 and Q 1 and counter evening 1 2 3, and T 1 b and T 1 b + T 2 b It is will be determined respectively by the number of clock frequency set value P 2 and Q 2 and counter 1 2 3, T1s & and the Ding 113, T 1 a + T 2 a and T lb + T 2 b it is a different time, respectively.

Therefore, the first recording reproduction surface 34 of the multilayer optical disc 1 00 of interest and the second recording reproduction surface 44 are bonded as shown in FIG. 3 (b), the multilayer optical disk 1 0 0 at a predetermined linear velocity V When the rotating, when recording on the first recording reproduction surface 34, the value of T 1 a (a 2 + G 2) determines the set value P 1 to be equal to / V, T 1 a + T a value of 2 a (a 2 + G 2 + D 2) ZV, determines a set value Q 1 to be equal to. And, as these values ​​becomes the set value for the counter evening 1 2 3, selection circuit 1

3 to determine the state of the control input 1 3 1 0.

On the other hand, when recording on the second recording reproduction surface 44, the value of T ib (A 3 + G 3- Z 1) / V (where, A 3, G 3, respectively, the second recording reproduction surface

44 address regions 44 first length, to determine the set value P 2 to be equal to indicate the length of the gap region 443), the value of T lb + T 2 b (A 3

+ G 3 + Z 2) determining the set value Q 2 to be equal to Bruno V. As these values ​​is the set value for the counter 1 2 3, selection circuit 1 3 By determining the status of the control input 1 3 1 0, the recording signal 1 2 of the first recording reproduction surface 34 5 and a, and the recording signal 1 2 5 b time T 2 a and T 2 b which is the active state of the second recording reproduction surface 44, both become the same timing, data Xi recording start position and a data recording end position will correspond with the first recording reproduction surface 3 4 and the second recording reproduction surface 44. That is, the recording range will match is the first recording reproduction surface 34 in the data area 3 42 next, the interval X 2 shown in the second recording playback surface 44 FIG. 3 (b). In other words, at the time of recording on the first recording reproduction surface 34, a predetermined data area 34 2 as a recording range, at the time of recording on the second recording reproduction surface 44, the de Isseki recording start position proceeding from the head of the data area 44 2 by precision Z 1 bonded two recording reproduction surfaces (ie, is displaced in the direction opposite to the scanning direction), the data recording end position of the first recording reproduction surface 34 de - evening area 34 by the rear end of the region Z 2 to 2 and the data area 44 of the second recording reproduction surface 44 2 overlap, the data recording start position and the data recording end position in the two recording reproduction surfaces over match , that is, the recording range is matched.

The calculation accuracy Z 1 and the first recording reproduction surface 3 4 bonding of the second recording reproduction surface 4 4 ​​(Detection of shift amount) may be carried out as follows. That is, from the time when the pulse 1 5 2 once a rotational output from the rotary encoder 1 5 1 is output, the output signal 1 of the envelope detection circuit 1 0 7 when reproducing the first recording reproduction surface 3 4 1 6 is first measured time output is then, from the time the pulse 1 5 2 once a rotation output from the mouth Isseki re-encoder 1 5 1 is outputted, the second recording reproduction surface 4 4 by measuring the time output is the output signal 1 1 6 Enbero flop detection circuit 1 0 7 when playing, determine the time difference therebetween, it may be divided by the linear velocity V.

As for the calculation of the section Z 2 of the data area 3 4 2 of the first recording reproduction surface 3 4 and the data area 4 4 2 of the second recording reproduction surface 4 4 ​​overlap, the length of the data area of ​​the two recording reproduction surfaces it is that since it is known, can be easily obtained based on the value of Z 1 calculated previously.

Incidentally, the multilayer optical disc structure employed in the description of the present embodiment has a configuration shown in FIG. 3 (a) and 3 described in the third embodiment (b), a gear-up area is inserted location, in the case of Adoresu area of ​​the data area and the next sector one retards de Isseki recording start position of the first recording reproduction surface 3 4 or the second recording reproduction surface 4 4 ​​only that bonding precision min it allows the data recording start position and the data SL recording end position in the two recording reproduction surfaces, such as described above, i.e., can be matched with the recording range.

As described above, Ri stuck in a state where the FIGS. 3 (a) and 3 (b) first recording playback surface 3 4 as shown in the second recording reproduction surface 4 4 ​​is shifted by a predetermined accuracy Z 1 also be combined, if the recording range and recording range of the second recording reproduction surface 4 4 ​​in the first recording reproduction surface 3 4 set as described above, the first recording reproduction surface 3 4 already there in the recorded also, the transmittance of the recording light is constant in the recording range of the second recording reproduction surface 4 4, the power of the recording light irradiated on the recording range of the second recording reproduction surface 4 4 ​​is made uniform at the time of recording that.

Thus, the difference in the signal amplitude of the playback signal due to non-uniformity of the power of the recording light in the recording range is eliminated, it is possible to Shi read out the correct data from the reproduced signal. In particular, when a phase-change material in the recording film constituting the recording surface is changed its phase state by the recording, since the difference in transmittance before and after the recording is large, it is possible to obtain a more remarkable effect it can.

(Fifth Embodiment)

Figures 6 (a) and 6 (b) is a diagram expressing the actual sector one structure in each recording reproduction surface in a multilayer optical disk as schematic sector one structure according to the fifth embodiment of the present invention.

First, it will be described with reference to FIG. 6 (a). 6 (a) is at a first recording reproduction surface 35 bonded to the second recording reproduction surface 4 5, the first recording reproduction surface 35 is of a light beam 8 5 for the second recording reproduction surface 4 5 illustrates a state shifted in the scanning direction (right side).

In FIG. 6 (a), 3 5 and 4 5, respectively, the first recording reproduction surface and the second recording reproduction surface that put the present embodiment shows a sector one Fomatsuto, 3 5 1 and 4 5 1 respectively, the address area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5 3 5 2 and 4 5 2 each, the first Symbol recording reproduction surface 35 and the second recording reproduction surface 4 5 the data area, 3 5 3 and 4 5 3, respectively, showing a Giya' flop area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5.

Further, 3 5 4 and 4 5 4, respectively, the first recording reproduction surface 35 and the second recording reproduction surface 4 5 data area tip portion guard assigned to (initial part) regions of the (guard data recording area) It is shown. Furthermore, 3 5 5 and 4 5 5 respectively show guard areas allocated to the rear end portion of the first recording reproduction surface 35 and the second recording reproduction surface 4 5 (terminal portion). The four guard areas are realm provided to protect the data recorded in the data area, for example, a signal having a single frequency is recorded. The first recording reproduction surface 35 and the guard area 35 4 and 4 5 4 assigned second respectively on the tip portion of the recording surface 4 5 have equal length L 2, the first recording reproduction surface 3 5 and the second recording reproduction surface 4 5 guard area 3, which is allocated to the rear end portion of the 5 5 and 4 5 5 also has a length equal L 3.

Further, L 1 is, when the first recording reproduction surface 35 and the second recording reproduction surface 4 5 is I paste case, which indicates the amount of deviation of the head position of the sector one in each recording surface of, the shift amount L 1 is equal to the deviation amount of the head portion of the data area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5, the first recording reproduction surface 35 of the second recording reproduction surface 4 5 bonding indicates accuracy, when compared with the length L 2 of the guard area 35 4 and 4 5 4 a L 1≤L 2.

Here, the data area 35 2 of the first recording reproduction surface 35 is assumed to be already recorded guard data Te including Me, then the second recording data of reproduction surface 4 5 Isseki region 4 5 2 guard when recorded, including data, the length L 1 of the region in the head portion of the data area 4 5 2 of the second recording reproduction surface 4 5 and the rest of the region and the recording light by a transmittance of the light beam 8 5 differences variations in the effective power is generated, a difference in amplitude of the reproduction signal resulting.

However, the region of the length L 1 that put at the beginning of the data area 4 5 2 of the second recording reproduction surface 4 5, a part of the second recording reproduction surface 4 5 guard area 4 5 4, the since the guard area as a region provided for protection of data recorded in de Isseki area, the reproduction signal in this area, the difference in amplitude due to differences in the effective power of the recording light is even it has been filed, Play de - there is no impact at all in the evening, so that the correct reproduction de Isseki is obtained. In other words, accuracy and 1 and the first recording reproduction surface 35 bonded to the second recording reproduction surface 4 5, respectively to the tip portions of the data area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5 if the assigned guard area 3 5 4 and 4 5 4 length refers 2 or less of the difference in amplitude of the reproduced signal caused by the difference in the effective power of the recording light as has been made, the reproduction de Isseki is no there is no effect, so that the correct reproduction data can be obtained.

Will now be described with reference to FIG. 6 (b). 6 (b) is, when the first recording reproduction surface 35 bonded to the second recording reproduction surface 4 5, the first recording reproduction surface 35 is of a light beam 8 5 for the second recording reproduction surface 4 5 scanning direction opposite illustrates a state shifted to (left side).

In FIG. 6 (b), L 1, similar to FIG. 6 (a), when the first recording reproduction surface 35 were combined second recording reproduction surface 4 5 stuck, sector one in each recording surface of the of and indicates the amount of deviation of the head position, the shift amount L 1 is equal to the deviation amount at the rear end portion of the data area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5, the first recording It indicates the bonding accuracy of reproduction surface 35 and the second recording reproduction surface 4 5, when compared with the length L 3 of the guard area 3 5 5 and 4 5 5 is a L 1≤L 3.

Here, de Isseki region 35 2 of the first recording reproduction surface 35 is assumed to be already recorded guard data Te including Me, then guard data area 4 5 2 of the second recording reproduction surface 4 5 when recorded, including the data, the length L 1 of the region and the remaining region of the rear end portion of the data area 4 5 2 of the second recording reproduction surface 4 5, recording by the transmittance of the light beam 8 5 differences No change in the effective power of the light emitting, a difference in amplitude of the reproduction signal resulting.

However, the region of the length L 1 that put on the rear end portion of the data area 4 5 2 of the second recording reproduction surface 4 5, a part of the second recording reproduction surface 4 5 guard area 4 5 5, since moth one de region as described above is an area provided for protection of the data recorded in the data area, the reproduction signal in this area, the difference in amplitude due to differences in the effective power of the recording light as well as it has been made, there is no impact at all on the regeneration de Isseki, so that the correct reproduction data can be obtained. In other words, bonding accuracy L 1 of the first recording reproduction surface 35 and the second recording reproduction surface 4 5, the rear end of the de Isseki area of ​​the first recording reproduction surface 35 and the second recording reproduction surface 4 5 if guard area 3 5 5 and 4 5 5 length 3 or less respectively allocated to the portion, as the difference in amplitude of the reproduced signal caused by the difference in the effective power of the recording light has been made, the reproduced data no there is no effect, so that the correct reproduction data can be obtained.

As described above, according to this embodiment, the first recording reproduction surface 35 and the second bonding accuracy of the recording reproduction surface 4 5, the first recording reproduction surface 35 and the second recording reproduction surface 4 5 Data the length of the guard area 35 4 and 4 5 4 assigned respectively to the tip portions of the region, by the following length of the guard area 3 5 5 and 4 5 5 respectively assigned to the rear end portion, always a positive not playback data can be recorded to be obtained.

Further, this embodiment, although the number of recording surfaces has been described for the case of 2, in the case where the number is three or more recording reproduction surfaces also accuracy allowed Hariawa the recording surface, assigned to the front end portion of the data area was the length of the guard area, and to be equal to or less than the length of the guard areas allocated to the rear end portion thereof by bonding the. respective recording reproduction surfaces, always right reproduction data from any recording surface recording can be carried out to be.

Claims

The scope of the claims
1. Pre-recorded address area and a data area has a plurality of recording reproduction surfaces having a split sector one structure Giyappu region having a pre length defined area, in the plurality of recording reproduction surfaces as the head position of the sector one is a length less accurate with the said gap area, the multi-layer optical disc, wherein the plurality of recording reproduction surfaces is bonded together.
2. Beforehand plurality of recording reproduction surfaces having a split sector one structure recorded address area and de Isseki region in the gap region, has been laminated with predetermined accuracy relative to the head position of the sector one , multilayer optical disc length possessed by the Giya' flop region, characterized in that the head position of the sector one is above a predetermined accuracy on the basis.
3. Address area and a data area for recording information, said address region and the first and second recording surfaces each having arranged a predetermined length of the gap area between the data area It shall apply in the multi-layer optical disk with a,
Head of the when viewed from the direction of the beam irradiated for recording and reproducing information with respect to the recording surface, the first and the second recording surface of the address area and the head position of Adoresu area of ​​the recording surface multilayer optical disc displacement amount between the position may be smaller than a length of the gap area.
4. Address area and a data area for recording information, said address region and the first and second recording surfaces each having arranged a predetermined length of a Giyappu area between the data area It shall apply in the multi-layer optical disk with a,
Wherein when viewed from the direction of the beam irradiated to the recording surface the information recording Z reproduction on the first recording surface Adoresu area of ​​the rear end position the second recording surface of Adoresu region of multilayer optical disc deviation amount between the rear end position may be smaller than the length of the Giyappu area of.
5. In the plurality of recording reproduction surfaces formed on every layer has a sector one structure in which a gap region between the light beam Adoresu area and a data area in the scanning direction of a certain said sector recording and reproduction flush the optical head position relative to the a bonding precision L, a length G in the scanning direction of the Giyappu region, the multi-layer optical disk that is configured to have a L≤G the relationship for all recording reproduction surfaces of the a method for recording information,
For the head position of the sector one in a recording and reproducing surface of said certain detects the amount of deviation of the head position of the sector one in the other recording reproduction surface,
Based on the detected deviation amount, the so that data recording start position and the data recording ending position for each of the sector one is to match in the plurality of recording reproduction surfaces, the data recording start position and the de of each recording reproduction surface the optical information recording method characterized by Isseki sets the recording end position.
6. The data recording start position respectively start and end positions of the data area in the recording reproduction surface where the head position of the sector one is most displaced in the direction opposite to the scanning direction among the plurality of recording reproduction surfaces and the de Isseki optical information recording method according to claim 5 wherein the set as a recording end position.
7. In the plurality of recording reproduction surfaces formed on every layer has a sector one structure in which a gap region between the light beam address area and a data area in the scanning direction of a certain said sector recording and reproduction flush the optical head position relative to the a bonding precision L, a length G in the scanning direction of the gap region, the multi-layer optical disk that is configured to have a L≤G the relationship for all recording reproduction surfaces of the a method for recording information,
For the head position of the sector one in a recording and reproducing surface of said certain, a detector for detecting a deviation amount of the head position of the sector one in the other recording reproduction surface,
On the basis of the deviation amount detected by the detecting unit, in order to de Isseki recording start position and the data recording ending position for each of the sector one is to match in the plurality of recording reproduction surfaces, the data recorded in each recording reproduction surface the optical information recording apparatus characterized by comprising a gate signal generator for generating a gate Bok signal for instructing said data recording end position from the start position.
8. The gate signal, the start and end positions of the data area in the recording surface of the head position of the sector one is most displaced in the direction opposite to the scanning direction among the plurality of recording reproduction surfaces, respectively optical science information recording method according to claim 7, wherein the instructing the data recording start position and the data recording end position.
9. A layer in which a plurality of recording reproduction surfaces having a sector one structure in which a gap region is formed between the light beam Adoresu region and de Isseki area scanning direction, of the sector one on each recording surface in the top position the scanning direction a multilayer optical disc comprising bonded to close at a predetermined accuracy, the distal end portion and the rear end portion of the data area in the scanning direction, has a length of more than the predetermined accuracy multilayer optical disc Gadode Isseki recording area is equal to or assigned a.
PCT/JP2000/002159 1999-04-07 2000-04-03 Multilayer optical disk, and method and device for recording optical information thereon WO2000062286A1 (en)

Priority Applications (4)

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JP11/99664 1999-04-07
JP9966499 1999-04-07
JP11/151078 1999-05-31
JP15107899 1999-05-31

Applications Claiming Priority (5)

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EP00913086A EP1191524B1 (en) 1999-04-07 2000-04-03 Multilayer optical disk, and method and device for recording optical information thereon
KR10-2001-7012702A KR100470468B1 (en) 1999-04-07 2000-04-03 Multilayer optical disk, and method and device for recording optical information thereon
AU34597/00A AU3459700A (en) 1999-04-07 2000-04-03 Multilayer optical disk, and method and device for recording optical informationthereon
US09/913,358 US6735158B1 (en) 1999-04-07 2000-04-03 Multilayer optical disk, and method and device for recording optical information thereon
DE60031536T DE60031536T2 (en) 1999-04-07 2000-04-03 Multilayer optical disc, and method and apparatus for recording optical information on this plate

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EP (1) EP1191524B1 (en)
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Also Published As

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EP1191524A1 (en) 2002-03-27
EP1191524B1 (en) 2006-10-25
KR20010111297A (en) 2001-12-17
AU3459700A (en) 2000-11-14
EP1191524A4 (en) 2004-07-28
US6735158B1 (en) 2004-05-11
DE60031536D1 (en) 2006-12-07
DE60031536T2 (en) 2007-06-14
KR100470468B1 (en) 2005-02-05

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